Locomotive boiler



May 1.5, 1928.

C. G. HAWLEY LocoMoTIvE BOILER Filed May 13, 1922 llllllllllllllllllllllllll ff' 43 E lllllllmlllIIIHHIIILUJ 1&1y (5b 14" IHI'HIll-lllllllllllllllu Patented May 15, 1928.

4tiiairii: D i STATES.

CHARLES GILBERT HAWLEY, 0F CHICAGO, ILLINOIS, ASSIGNORLKOLOCOMOTIVE.FIRE- `:BOX COMPANY, 0F CHICAGO, ILLINOIS,l Ar CORPORATION OF DELAWARE.

LocoMoTIvnBoILnR., l

Application inea` may i3, iezafseyriei 'Nt'. `5`eo,e53.`-

My invention relates to improvements in locomotive boilers and has particular reference to the iireboxes thereof. The invention is adapted to ireboxes of both the plain'flue 5 sheet type and the combustion chamber type,

although I have shown only the latter in the drawings accompanying this speciiication. longitudinal' section of ya vlocomotive boiler and its internal reboXg, Fig. 2 is a partial rear end elevation thereof; Fig. 3 is a verticalcross lsect-ion substantially on the line 3-3 of Fig. l; Fig.y et' is a horizontal sectionon the line of Figi; and, Fig'. 5 is a sectional detail, enlarged, upon any` one oi' the line 5-5 of Fig. l. As herein shown, the firebox embodying iny invention has tivo ii're doors QtseelFig. 2). It may haveonly asiiigle iire door, though not so advantageously, this'inventioii being peculiarly adapted "to iireboxes ofthe Iwidel type usuallyhavingtvvo doorseThev iirebox is divided by iaver'tical middle Water,- wall 3, which I utilize as a means of increasing the heatingarea' of the'iireboxfandespecially in promotinga` vigorous forefandaft circulation of theboiler Water throughlout the boiler. i

' The general object` offmy invention is to obtain more effectual ,combustion of the fuel 1n the lirebox; to obtain'a more fei'licient f transmission of heat. `between'fthe:radiant products of combustion and the' boiler Water; and especially to improve 'the circu lation of Water Within ,the boiler;y to "the end that the Acapacity and yeifiiciency ofthe boiler shall be improved andthe durability of bothy i'irebox andfboiler increased.

'It is a "simple matter to determine to put Va niiddle'ivaterwall or partition in a locomotive boiler iirebox, but as often as itlias been tried itlhas been abandoned, usually because of. faulty operatioiifand alivay-s because of the practical impossibility of maintaining the partition against[disruptionbythe'con- In said drawings Fig. ly is a vertical Primarily, my 'invention vfo'vercoiiies the former" diiicult'ies by constructing the partition.' orfvvater Wall 3 `ina iorm which best adapts it tothe freecirculation of the Water and a free disposal 'of the generated steam andespecially insuchmanner as not f to invadejor r`actually divid'e` the iireboX' con`- sidere-d as' aflwyhole;` In brief, Iprovide the vWall livitlif openings 4 and 5 oi' such size and posit-ioii-fasto valow a free interchange of gasesaiid heat between the `tivo parts G and N fol-FIcpr..f

7 "of the .irebox. `'This last I li'nd necessary' inyorder that 'suliistantially` uni-forni `and equal, temperatures `may be maintained in the two sides and 7 of the iirebox, notwithstanding Variations inthe rates oiicombustion therein orthevaryiiig Viii-rush of cold air through thejfuel doors.

' v"In every "tormfof my invention there will be `found ariiiiddle 'water-circulating-ande f steainingfwall'oi".partition 'which iis-in cominuiiicati'on with the ivaterjin the loiver part Snot the boiler-and which `at the topis in free"communication with the top 9 'ofthe vboiler ;4 andiInportantly this partition occupies onlya portion ofthe middle of the fire- 'b`o,x,` leaving ,the large communicating open ings Land `fi'between thetwo sides 6 and 7 fof theglratter,4 By this -last precaution, yalthouglitlietivo sides oithe krebox have sepvarate.gfrates andffires of different intensities, thereis alw'ay's a! "fsiiiiicient intermingling. ot

gases 4to keepftlie'fsidesof theivater 'Wall so nearly at the sainetemperature as to 'avoid destructive ditl'eieiices of expansion and "con- 'trzictioiilj` Fu'rther`details oi my invention comprehend specialfforiiis for the partition (HQE/bulging parte?) whereby it adapted 'for eiiiployn'ient with iiebricl: arches or baiiie Walls lO'iiiteiidedto improve combusk y 3 which I adopt y `forI the l"supportofthearch brick .also serve as absorbers .of expansionl differences be tion. i ,The bulging portions tween ther'stvayed sides ofthe .Water `Wall. f sFurther referring to the drawings, atten- 'i tion` is called tor the inudring or `foundation- I'ing, 1.1,iof'tliefirebox- This, as Well shown in Iiligs'. 3 andjll, is provided with the inid- Wdlefbar or section fil, ivhich serves as the `jl'oiindatioii 'for the Waterssteamingland-circulating Wall 3. From*thelniiid-iing bar 11',

the Wall rises directly to,"and opens upward v tlirouglithe crown sheet'lQ ofthe fireboX.

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The other sheets or part-s ofthe firebox s.

y are the side .sheets 6 and 7', the throat sheer and. t umy imei; p sheet i3.. The* same and,

such pattern as here indicated (toI provide the openings l aude) and joined by Closely spaced stay-bolts 3b. sshotvn iii lwig.rv 5 the edges 3,0 ofthe sheets are flanged together and joined by an' autogeiiou's "weld or yseari'i' 3"'. 'I`lie` rear botto'i'nwend for the `wall presents a v( 'ti arly elongated slot-like open? ing" 'lel u'hi'cl'i i's in' direct communication with the rear `wat'er-legIB or firebo'X, the component sheets and inurl-ring Vbeing unitedl by riveted' aiid'ivelded Searns. A like' condition obtains at the bottoni front end or the wall 3', wherev the hollow" portion 3f' is inx open' communication withy the front water-leg or throat Sol the boil* rIfhe open top 35 ol' the wall is longitudinally exten'- sive, as compared with' the' intake openings and 3f.` At all or these openings, 3?, `43f and the component sheets of tliewall may be flanged outwardly, as required by the best welding` and staylboltingl practices.

Obviously the inud' ringbar ror'ins' the bottoni or the water wall' a'ndto' dispose of any accumulation' of, sediment ythereon I provide one or niore blow-oill cock'sfl'fl, see Figs. l and 2. These supplement theothe'r lfilow-otl `coe'l'rs andwasli-ou't plugs l5 with which the rebox is equipped; y e

ttentionis called to the" fact 4that by preference the closed reary end of the wall starts upwardf'fr'om a point/belo'wjjthe rfuel door inl the back head 113.y Similarly the closed front end of the ywall starts' upafrd from apoint on the throat iu'e sheet 8 belowl the loor 6X' of the yrebofi'co'in'bustion chamber, erin the' case of` a' plain ir'eb'ox, ata point' belowthe bo'ile'rliues. f

In every' case the upper rear and' front ends ot' the wallstand"awa'ylroin the back sheet 13 and the.' l'lu'ev sheet 15 respectively. In addition to proyifding the large openings el' and 5, the described forni of wall leaves ample space for treey access" to all parts ot the adjacent Firebox sheets, staybolts and lines. n y

It will be noted that the described wall construction is such as' to avoid all danger ot pocket-ing steam within the hollow wall; is such as to provide a very wide 'free opening' for the .discharge or' steam and water trom the top of the wall; and, is such as to admit ot' wash-out access to every interior surface oli' the wall. All' these are matters of great importanceA with relation to the problein of maintaining the stri'i'cture.r Secondaril'f, in this regard attention is called to the upward and rearward slantin'lo,l position of the expansion absorption bulges' S in" the side'sor the wall.l As will be observed,

tlresevfare substantially perpein'tliculajr` to the stress lines setup' by the' relatively diagonai ezqnansionfand contraction movements 1n a @rates shown the boiler water is ra idl I f 3 li'eated vand evaporated upon heating surfaces olvthe ii'reb'ox, and espe"i`ally within' the dividing" wall' 3, wl'i'icli is heated on both' s; ts. the h'ig'hly yheated 'water in 'tl1eiv`all"l, lightene'dV by the presence "of niuny steani bubbles, raiwiidly displaced by the cooler water liilo'in thebottfoin' of the boiler. 'lhus an extremely rapid and posi'- tive circulation ot water is eety up throught out the boiler with great benefit totheheating'eiiiciency'ot all its heating surfaces, lire# box and tl'ues included.

Incidentally, the safety ol tlre rebol is insured by the therniic action or' the wall. In event the water in the boiler is allowed to tall so low as to uncover tlie crown sheet, they greater part or' the latter is nevertheless fuuy bathed with the water wlcir at Such tiines fountains r'oni 'tl'ie'wall and spreads over the 'crown sheet. vBut for| this the rown she/'et would befcoine hot and being violently blovviidowny away from' the hun"- dreds" of crown bolts 17,- a disastrous boiler explosion would' occur. y v The' parts niarked 18' 'arel wash-out pluL's positioned yint-he" irebo'Xfs'hell above the' top opening' of the wall for an obvious pfui'- pose similar wash-out plugs 18 Aare' provided in mettront' andbajek @freie rebo'xl Shen.

In closing, I desireith'at it be understood that rn'y invention' is" noty liinit'etl to' one such longitudinal water Wa'llv ina Ilirebo. My invention cornprehends 4 and it is: entirely retzen-e to 'use' te@ such Wausin' my 'wide lireboX, 4and the' three' vllongitutlinal grat'es characteristic of two walls can easily be fired through two fuel doors; the 'following claims the terni-middle bar of the niud ring-is'to be construed accordingly, for it Inay rnean a sfiri'gle bar or one of two such iniddlebarsin av singleltirebo'x. l

Having thus described 'ray invention, I claimkas new and' desire to vsecu-re by Letters Patent '1. A loconiotiveb'oiler and lire boXveinbodying therein, a crown sliee't, side sheets and front and rear' sheets, an upright flat tubular' waterv wall eiit'ending longitudinally or the lire box between said s'i'de .sheets and connected at its ends witli'tlie bottompoi'- t'ionls onlyof the front and rear water" legs of the boiler and opflaning"` aft its tp through tl'ie' crown sheet, vsaid ywater wall', 'substansiny t-ially ydividing the iireboi; into plurality of are' chambers conncterogthr only at the ends of the water wall above its points of Connect-ion with said front and rear water legs, whereby temperature conditions in- Y and substantially dividing the fire box into a plurality of fire chambers connected together only at the ends of the water wall above its points of connection with said front and rear water legs vwhereby temperature conditions in said fire chambers are substantially equalized.

A locomotive boiler and lire boxembodying therein, a Crown sheet, side sheets and front and rear sheets, an upright flat tubular water wall extending longitudinally of the fire box between said side sheets and connected at its ends with they front and rear water legs of the boiler and opening at its -top through the crown sheet, said water wall having 4bulged portions inclined upwardly and rearwardly from said front water leg and substantially dividing lthe re box into a plurality of fire chambers connected together only at the ends of the water wall above its points 'of connection with said front and rear water legs whereby tempera,-

ture conditions 'in said lire chambers are substantially equalized, water tubes connecting the saidl front and rear water legs and having portions in parallel relation with said bulged portion of said water wall and fire the water wall and said water tubes.

In testimony whereof, I have hereunto set my hand this 6th day of May, 1922.

CHARLES GILBERT HAWLEY.

brick supported upon said bulged portion of 

